Statement

At present, matchld-2d / 3D system is widely used in material mechanics, fatigue and fracture mechanics, structural mechanics, impact mechanics, vibration mechanics, micro nano mechanics, biomechanics and so on. The majority of researchers and enterprise engineers use matchid-2d / 3D system for the following applications:

In the conventional deformation measurement of materials and structures, mi-dic technology is used to replace the traditional strain gauge, LVDT and other tools to measure the full field strain and displacement;

Using the data of strain field and displacement field measured by mi-dic to carry out material constitutive inversion directly by using mi-vfm technology, a more accurate and reliable material model can be obtained and provided to the simulation department, which greatly shortens the simulation cycle and improves the work efficiency;

By using mi-feavl technology, the simulation results can be compared with the actual measurement results of DIC under the condition of coordinate alignment, uniform grid and uniform filtering, so as to quickly and accurately find out the large errors of the simulation model so as to further improve the model and improve the model accuracy!

In order to understand the dynamic and static mechanical properties of materials and identify their parameters, engineers often need to do various tests on the selected materials:

(1) static test: uniaxial tension, compression, shear, three-point bending, fracture, fatigue, high and low temperature deformation, etc. the 3D displacement, strain, stress, real stress-strain curve at any point of the material surface can be measured rapidly by using matchid-2d / 3D full field strain measurement and simulation optimization system.

Mi-dic has the function of calculating stress field. Users can calculate stress field by checking standard material parameters or material constitutive model solved by mi-vfm. The stress calculation module is very powerful, which supports the stress field reconstruction of elastic-plastic, hyperelastic, viscoelastic, viscoplastic and other materials!

(2) dynamic test: high strain rate tensile compression, fatigue, impact test (Hopkins bar impact), etc.

At present, the sampling rate of high-speed camera can reach 10MHz. Matchid-2d / 3D system with high-speed camera can perfectly record some high-speed tensile compression tests,

In Hopkinson bar test and other experiments, the surface image of the object is calculated by DIC to obtain displacement field, strain field and stress field, and then the material constitutive formula is obtained by mi-vfm

Don't be plastic.